Over the past few decades, astronomers have for the first
time identified the major constituents of the universe.
Unexpectedly, the universe hardly resembles what we
thought only a couple of decades ago. The universe is filled
with dark matter more abundant than ordinary matter and
dark energy that is causing a runaway acceleration. Theory
is not yet able to explain this unexpected universe. New
giant telescopes planned for the next decade are likely to
reveal more surprises. In her lecture, Professor Freedman
will describe these recent advances.